S

Model is 5'9" and wearing a size XS Runs true to size  Size Chart

Model is 5'9" and wearing a size XS Fits true to size  Size Chart

Model is 5'9" and wearing a size XS Runs true to size  Size Chart

Model is 5'9" and wearing a size XS Runs true to size  Size Chart

Model is 5'11" and wearing a size S Runs true to size  Size Chart